diff --git a/docs/mooseide-integration.md b/docs/mooseide-integration.md
index 84917fe..6e38879 100644
--- a/docs/mooseide-integration.md
+++ b/docs/mooseide-integration.md
@@ -22,3 +22,18 @@ fork-first v3 development work, not a published v3 release.
 
 GitHub CI loads these optional tests in the ready-made Moose image. The plain
 Pharo job continues to test Core without GUI dependencies.
+
+## SQL CoUsage
+
+Select **SQL relation references** as the inner-box extractor in the standard
+CoUsage map settings, or use:
+
+```smalltalk
+FmxSQLCoUsageExtractor openOn: (model allWithType: FmxSQLStoredProcedure).
+```
+
+Containers are routines, views or tables; inner boxes are referenced database
+tables/views. Column references are projected to their owning relation, and
+foreign keys contribute referenced relations. Repeated references retain usage
+counts. Empty results mean no modeled references, not proof that dynamic SQL has
+no dependencies. The helper rejects mixed/unsupported input before opening.
diff --git a/src/FamixNGSQL-MooseIDE-Tests/FmxSQLCoUsageTest.class.st b/src/FamixNGSQL-MooseIDE-Tests/FmxSQLCoUsageTest.class.st
new file mode 100644
index 0000000..09ecbdd
--- /dev/null
+++ b/src/FamixNGSQL-MooseIDE-Tests/FmxSQLCoUsageTest.class.st
@@ -0,0 +1,41 @@
+Class {
+ #name : #FmxSQLCoUsageTest,
+ #superclass : #TestCase,
+ #category : #'FamixNGSQL-MooseIDE-Tests'
+}
+{ #category : #tests }
+FmxSQLCoUsageTest >> testSharedRelationsAndRepeatedReferences [
+ | model table column first second extractor browser |
+ model := FmxSQLModel new.
+ table := FmxSQLTable new name: 'records'; mooseModel: model; yourself.
+ column := FmxSQLColumn new name: 'id'; columnsContainer: table; mooseModel: model; yourself.
+ first := FmxSQLStoredProcedure new name: 'first'; mooseModel: model; yourself.
+ second := FmxSQLStoredProcedure new name: 'second'; mooseModel: model; yourself.
+ FmxSQLColumnReference new source: first; column: column; mooseModel: model.
+ FmxSQLTableReference new source: first; table: table; mooseModel: model.
+ FmxSQLTableReference new source: second; table: table; mooseModel: model.
+ extractor := FmxSQLCoUsageExtractor new.
+ self assert: (extractor innerEntitiesFor: first) asArray equals: { table. table }.
+ self assert: (extractor innerEntitiesFor: second) asArray equals: { table }.
+ browser := FmxSQLCoUsageExtractor openOn: { first. second }.
+ [ self assert: browser specModel containerBoxes size equals: 2.
+   self assert: browser specModel innerBoxes size equals: 1 ]
+   ensure: [ browser window close ]
+]
+{ #category : #tests }
+FmxSQLCoUsageTest >> testForeignKeyAndEmptyTable [
+ | model source target column constraint |
+ model := FmxSQLModel new.
+ source := FmxSQLTable new name: 'source'; mooseModel: model; yourself.
+ target := FmxSQLTable new name: 'target'; mooseModel: model; yourself.
+ column := FmxSQLColumn new name: 'id'; columnsContainer: target; mooseModel: model; yourself.
+ constraint := FmxSQLForeignKeyConstraint new name: 'fk'; table: source; mooseModel: model; yourself.
+ FmxSQLColumnReference new foreignKeyConstraintSource: constraint; column: column; mooseModel: model.
+ self assert: (FmxSQLCoUsageExtractor new innerEntitiesFor: source) asArray equals: { target }.
+ self assertEmpty: (FmxSQLCoUsageExtractor new innerEntitiesFor: target)
+]
+{ #category : #tests }
+FmxSQLCoUsageTest >> testUnsupportedInputIsRejectedBeforeOpening [
+ self should: [ FmxSQLCoUsageExtractor openOn: { Object new } ] raise: Error.
+ self should: [ FmxSQLCoUsageExtractor new innerEntitiesFor: Object new ] raise: Error
+]
diff --git a/src/FamixNGSQL-MooseIDE/FmxSQLCoUsageExtractor.class.st b/src/FamixNGSQL-MooseIDE/FmxSQLCoUsageExtractor.class.st
new file mode 100644
index 0000000..823c44b
--- /dev/null
+++ b/src/FamixNGSQL-MooseIDE/FmxSQLCoUsageExtractor.class.st
@@ -0,0 +1,46 @@
+"Co-usage of database relations: containers are routines, views or tables;
+inner boxes are referenced tables/views. Repeated references retain their frequency."
+Class {
+ #name : #FmxSQLCoUsageExtractor,
+ #superclass : #MiCoInnerEntitiesAbstractExtractor,
+ #category : #'FamixNGSQL-MooseIDE'
+}
+{ #category : #accessing }
+FmxSQLCoUsageExtractor class >> menuItemName [ ^ 'SQL relation references' ]
+{ #category : #accessing }
+FmxSQLCoUsageExtractor class >> description [
+ ^ 'Referenced tables and views, including column and foreign-key references. Repeated references count as repeated uses.'
+]
+{ #category : #testing }
+FmxSQLCoUsageExtractor class >> accepts: entity [
+ ^ { FmxSQLTable. FmxSQLForeignTable. FmxSQLView. FmxSQLStoredProcedure }
+   anySatisfy: [ :class | entity isKindOf: class ]
+]
+{ #category : #opening }
+FmxSQLCoUsageExtractor class >> openOn: entities [
+ | browser |
+ (entities allSatisfy: [ :entity | self accepts: entity ]) ifFalse: [
+   self error: 'SQL CoUsage expects only tables, views or routines' ].
+ browser := MiCoUsageMapBrowser new.
+ browser specModel settings innerBoxExtractor: self.
+ browser open.
+ browser followEntity: entities asMooseGroup.
+ ^ browser
+]
+{ #category : #querying }
+FmxSQLCoUsageExtractor >> innerEntitiesFor: entity [
+ | relations |
+ (self class accepts: entity) ifFalse: [ self error: 'Unsupported SQL CoUsage entity' ].
+ relations := OrderedCollection new.
+ entity queryAllOutgoing do: [ :reference |
+   ((reference isKindOf: FmxSQLColumnReference) or: [
+     (reference isKindOf: FmxSQLTableReference) or: [ reference isKindOf: FmxSQLViewReference ] ]) ifTrue: [
+     reference allTargets asSet do: [ :target |
+       | relation |
+       relation := (target isKindOf: FmxSQLColumn)
+         ifTrue: [ target columnsContainer ] ifFalse: [ target ].
+       ((relation isKindOf: FmxSQLTable) or: [
+         (relation isKindOf: FmxSQLForeignTable) or: [ relation isKindOf: FmxSQLView ] ])
+           ifTrue: [ relations add: relation ] ] ] ].
+ ^ relations
+]